Telfer carriage

ABSTRACT

The invention concerns a telfer carriage comprising dual end supports a supporting beam, hoisting and displacing machinery and a rope drum. To the end supports has been pivotally affixed the supporting beam lying immediately beside the rope drum and parallel therewith. The end supports have been rigidly joined together by a non-rotating axle, on which are furthermore rotatably carried, the rope drum and a carrying wheel pair.

BACKGROUND OF INVENTION

The present invention concerns a telfer carriage such as for a hoistcomprising dual end supports a supporting beam, hoisting and displacingmachinery and a rope drum.

The drawback of telfer carriages of prior art was in many instancestheir carriage large size compared with the load which they lift. Inparticular the large height dimension has been objectionable because ithas often been necessary on account of this height to raise the roof ofa shop hall higher. Moreover, extra loads have been imposed by the bigand heavy telfer carriage structures both on the building and on thehoist itself. It becomes necessary to reinforce the buildings, andsimilarly the beam structures of the hoisting means must be made sturdy.This tends to involve undesirably high costs.

SUMMARY OF INVENTION

The object of the present invention is to provide a telfer carriagewhich is small in size, and light weight related to the load which itcan lift. Particularly great attention has been paid to the heightdimension of the telfer carriage. The telfer carriage of the inventioncomprises dual end supports, a supporting beam, hoisting and displacingmachinery and a rope drum. The telfer carriage is characterized in thatthe dual end supports have been pivotally affixed to the supportingbeam, and that the end supports have been rigidly joined to each otherby means of a non-rotating axle, on which furthermore the rope drum anda pair of carrying wheels have been rotatably carried. The advantage ofsuch a telfer carriage is its small size and, as a consequence thereof,its light weight. When the supporting beam undergoes deflection byeffect of the load, the pivots prevent the bending moment from beingtransferred to the end supports, which therefore need not handle anystresses arising from tilting of the end supports.

The telfer carriage according to a favourable embodiment of theinvention is characterized in that the supporting beam is locatedimmediately beside the rope drum and parallels it. The advantage is acompact carriage construction.

The telfer carriage of another favourable embodiment is characterized inthat the axis of the pivot between the supporting beam and the endsupports is parallel with the end support's longitudinal axis.

The telfer carriage of still another favourable embodiment ischaracterized in that the top margin of the supporting beam and thehighest point of the rope drum are on the same height, and that thelower margin of the web plate between the rope drum and the rope sheaveslies above the axial plane of the rope drum. The advantage is then a lowstructural height for the carriage and the avoidance of dangerous Sbights in the lifting ropes.

DESCRIPTION OF INVENTION

The invention is described in greater detail in the following with theaid of an example, with reference being made to the attached drawings,wherein:

FIG. 1 presents the telfer carriage of the invention, in top view;

FIG. 2 shows the telfer carriage as viewed from the front and sectionedalong the line I--I in FIG. 1; and

FIG. 3 shows the telfer carriage in elevational end view.

As shown in the drawings, the telfer carriage comprises a rope drum 1which is rotatably carried on a stationary axle 2. On the same axle 2,the carrying wheel pair 7 has also been rotatably mounted. The carryingwheels are located within the end supports 3. Moreover, the end supports3 have been rigidly joined by the same non-rotating axle 2, which takesup the steering forces of the telfer carriage. The supporting beam 6 isa welded sheet metal structure open on the underside, and it has beenaffixed with pivots 8 to the end supports 3 so that the supporting beam6 will be immediately adjacent to the rope drum 1 and paralleltherewith. The pivots 8 parallel the end supports 3 and have been fixedon top of them. This pivotal attachment makes possible the action thatthe bending stresses arising in the supporting beam 6 are nottransmitted to the end supports 3.

Inside the supporting beam 6 has been rotatably carried the set of ropesheaves 9 which transmits the rope forces to the supporting beam. Thehoisting mechanism comprises, among other things, a hoisting motor 11with brake, a fine adjustment mechanism 12, a lifting gearbox 13 and anopen transmission 14. Furthermore, the telfer carriage comprises adisplacement mechanism 5 and displacement shaft 15 with carrying wheels16. The hook housing 17 and hook 18 have been designed with a veryminimal height, with a view to economizing the important space. It isalso an important feature of the invention that web plate 10 of thesupporting beam 6, which is towards the rope drum 1, has been designedsuch that its lower margin lies higher than the axial horizontal planeof the rope drum 1. This is important in order that one might avoid Sbights which are dangerous to the ropes, as the ropes run from the drumto the hook. The top margin of the supporting beam 6 and the highestpoint of the rope drum 1 are on the same height.

It is obvious to a person skilled in the art that different embodimentsof the invention are not exclusively confined to the example relatedabove and that they may vary within the scope of the claims below.

I claim:
 1. A telfer carriage having light weight and low structuralheight, comprising:dual end supports for the carriage, said end supportsbeing mutually rigidly joined together by a non-rotating axle; acarrying wheel pair located within said end supports and rotatablymounted on opposite ends of said axle; a supporting beam having saiddual end supports pivotally affixed to the supporting beam by dualpivots, said supporting beam including a web plate and having a set ofrope sheaves rotatably carried therein; and hoisting and carriagedisplacing mechanisms and a rope drum which is rotatably carried on saidaxle, whereby the dual pivots provided between the dual end supports andthe supporting beam prevent bending loads imposed on the supporting beamfrom being transmitted to the end supports and thereby provides lightweight and low structural weight for the carriage.
 2. A telfer carriageaccording to claim 1, wherein the supporting beam lies immediatelybeside the rope drum and is parallel therewith.
 3. A telfer carriageaccording to claim 1, wherein the top margin of the supporting beam andthe highest point of the rope drum are on the same height and that thelower margin of the web plate between the rope drum and the rope sheaveslies above the axial horizontal plane of the rope drum.
 4. A telfercarriage having light weight and low structural height for liftingloads, said carriage comprising:dual end supports for the carriage; anon-rotating axle which mutually and rigidly joins together said dualend supports; a carrying wheel pair rotatably mounted on opposite endsof said axle and located within said end supports; a rope drum rotatablycarried on said axle; a supporting beam pivotally affixed at each of theends to said dual end supports by dual pivot means, said beam locatedbeside and parallel with said rope drum and including a web plate andhaving a set of rope sheaves rotatably carried within the beam, whereinthe web plate lowest margin located between the rope sheaves is abovethe axial horizontal plane of said rope drum, whereby the pivots locatedbetween said dual end supports and the supporting beam prevent bendingloads imposed on the supporting beam from being transmitted to the endsupports, thereby providing light weight and low structural height forthe carriage.
 5. A telfer carriage having light weight and lowstructural height for lifting loads, said carriage comprising:dual endsupports, which are mutually and rigidly joined together by anon-rotating axle; a carrying wheel pair rotatably mounted on oppositeends of said axle and located within said end supports; a rope drumrotatably carried on said axle; a supporting beam pivotally affixed ateach of its ends to said dual end support by dual pivot means eachlocated parallel to the longitudinal axis of the end supports, said beamlocated beside and parallel with said rope drum and also including a webplate and having a set of rope sheaves rotatably carried inside thebeam, whereby the pivots located between said dual end supports and thesupporting beam prevent bending loads imposed on the supporting beamfrom being transmitted to the end supports, and thereby provides forlight weight and low structural height for the carriage.
 6. A telfercarriage having light weight and low structural height, comprising:dualend supports for the carriage, said end supports being mutually rigidlyjoined together by a non-rotating axle; a carrying wheel pair locatedwithin said end supports and rotatably mounted on opposite ends of saidaxle; a supporting beam having said dual end supports pivotally affixedto the supporting beam by dual pivots, so that the axis of the pivotsbetween the supporting beam and the end supports is parallel with thelongitudinal axis of the end supports, said supporting beam including aweb plate and having a set of rope sheaves rotatably carried therein;and hoisting and carriage displacing mechanisms and a rope drum which isrotatably carried on said axle, whereby the dual pivots provided betweenthe dual end supports and the supporting beam prevent bending loadsimposed on the supporting beam from being transmitted to the endsupports and thereby provides light weight and low structural height forthe carriage.